Bourns® TBU® High-Speed Protectors Short Form Brochure Bourns® TBU® Product Overview Basic TBU® Device Operation Bourns® TBU® high-speed protectors are circuit protection devices constructed using MOSFET semiconductor technology. When placed in series in the system, the TBU® protector monitors the current flowing through the line. If the current exceeds a preset level, the TBU® device triggers, providing an effective barrier to large, destructive voltages or currents during surge events, thereby protecting sensitive electronics. The TBU® device operates in approximately 1 μs - once line current exceeds the TBU® device’s trigger current Itrigger. When operated, the TBU® device restricts line current to less than 1 mA typically, and blocks voltages including the surge up to rated limits. After the surge, the TBU® automatically resets itself when the voltage across the TBU® device falls to the Vreset or below. Therefore, the TBU® device will automatically reset on lines which have no DC bias or have DC bias below Vreset (such as unpowered signal lines). If the line has a normal DC bias above Vreset, the voltage across the TBU® device may not fall below Vreset after the surge. In such cases, special care needs to be taken to ensure that the TBU® device will reset; software monitoring may be used to accomplish this task. Bourns application engineers can provide further assistance. TBU-based Solution Device Selection Key Features: • • • • • • TBU® device is used in series with the line TBU® device is triggered by current rise TBU® device can block voltages up to 850 V, enabling easy coordination TBU® device provides superior protection in less than 1 µs TBU® device resets on voltage TBU® device offers an extremely low capacitance per line Key Benefits: • • • • • • • • • High-speed performance Blocks voltages and currents Extremely low let-through energy of 100 nJ Self-resetting on non-DC biased lines Very high bandwidth up to 3 GHz Small size in DFN package TBU-PL & TBU-PK series offer voltage triggering Smallest PCB area Ultra low profile TBU-VI Curve I Forward Trigger Current IOP Reset Voltage Threshold Residual Reset Current 1/R Reset Voltage Threshold Reverse Trigger Current V -IOP Step 1: Current characterization: Determine the peak system operating current and maximum operating ambient temperature. Use the TBU® device data sheet’s “trigger current versus temperature” derating curve to determine the TBU® device derating value. 2 Step 2: Overvoltage selection: Select an overvoltage device that has the lowest available DC breakdown voltage greater than the normal system voltages and any expected AC power faults. The selected device must also be capable of handling the required lightning current. Step 3: TBU® device selection: Choose a TBU® device with a maximum impulse voltage (Vimp) greater than the maximum impulse breakover or clamping voltage of the selected overvoltage protector. The selected TBU® device must also have a minimum specified Itrigger above the maximum peak system operating current compensating for the temperature derating. Step 4: Tertiary protection: In most applications, the protected circuit sources sufficient current to trigger the TBU® device. If the protected circuit impedance is high, a small avalanche diode to ground or small signal diodes clamping to the power supply rails may be placed after the TBU® device. This will ensure that the TBU® device triggers, preventing the voltage at the interface from rising to unsafe levels. Bourns® TBU® Product Examples VOICE VOICE Protection Solution Selection Guide GND Bourns® TBU® Device Selection TBU-PL060-100-WH Line 1 Line 1 SLIC MOV-10D201K TBU MOV-10D201K Line 2 SLIC Line 2 Industry Standard 1 MOV-07D201K 2 Telcordia GR-1089-CORE Intra-building Port Type 4a 1000 V, 100 A 10/1000 µs 120 Vrms, 25 A, 900 s TBU-PL060-100-WH 1 MOV-10D201K 2 5000 V, 500 A 2/10 µs 230 Vrms, 25 A, 900 s TBU-PL085-100-WH 1 MOV-10D361K 2 1500 V, 100 A 2/10 µs 275 Vrms, 25 A, 900 s TBU-PL085-100-WH 1 MOV-10D431K 2 4000 V, 40 Ω 10/700 µs 230 Vrms 10 Ω - 1000 Ω, 900 s 600 Vrms 600 Ω, 0.2 s TBU-PL075-100-WH 1 MOV-10D361K 2 4000 V, 40 Ω 10/700 µs 230 Vrms 10 Ω -1000 Ω, 900 s 600 Vrms 600 Ω, 0.1 s TBU-PL060-100-WH 1 TISP4400M3BJ 2 6000 V, 40 Ω 10/700 µs 240 Vrms 10 Ω - 1000 Ω, 900 s 600 Vrms 600 Ω, 0.2 s 600 Vrms 600 Ω, 1 s* 1500 Vrms, 200 Ω, 2 s* TBU-PL085-100-WH 1 MOV-10D391K 2 6000 V, 40 Ω 10/700 µs 240 Vrms 10 Ω - 1000 Ω, 900 s 600 Vrms 600 Ω, 1 s 1500 Vrms, 200 Ω, 2 s TBU-PL060-100-WH 1 TISP4500H3BJ 2 Non-GR-1089-CORE Intrabuilding Specifications ITU-T Basic K.20, K.21, K.45 2031-15T-SM TBU-CA050-500-WH C1b ITU-T Enhanced K.20, K.21, K.45 T1a Transformer TBU1 TTIP P850-U T1/E1 TRING Physical Line Interface RTIP Unit 1 RRING 1 T1b CM Transformer 1 2 3 4 8 7 6 5 1.25 A Fuse P850-U Tx Tip 2031-42T-SM Fuse 1.25 A TBU1 Qty TBU-PL050-100-WH C1a T1/E1 Interface OVP Device Part Number 1500 V, 100 A 2/10 µs 120 Vrms, 25 A, 900 s VDSL VDSL Driver TBU® Device Part Qty Number Telcordia GR-1089-CORE Intra-building Port Type 4 -VBAT Review VOICE Protection Solution Selection Guide to select TBU® and overvoltage part numbers to meet protection industry standard. Surge & AC Withstand Tx Ring 1.25 A Fuse Rx Tip 2031-42T-SM Fuse Rx Ring 1.25 A * GDT Special Test Protector with DC breakdown (DCBD) of less than 330 V. Notes: 1) The Le9500, Le9520 and Le9530 (VE950 series) require a 200 mA Itrigger TBU® device for normal operation. Other SLIC types should use the 100 mA device. 2) The MOV maximum continuous rms voltage rating should not be exceeded. The exception is where the data sheet highlights withstand capability such as the 600 V rms, 1 A for 0.2 s, for example. 3) If EN55024 EMC compliance is required, the TBU® device may require capacitors to be fitted between the Tip and Ring connections and ground (i.e. in parallel with the MOV device). The capacitance value can be chosen to meet levels as follows: • 10 nF for EN55024 Level 1 • 20 nF for EN55024 Level 2 • 47 nF for EN55024 Level 3 Selection of capacitor voltage rating depends upon TBU® part number selection. Recommendations include: • TBU-PL050 & TBU-PL060 Series: 120 VAC, 500 V Peak Surge Rated • TBU-PL075 & TBU-PL085 Series: 240 VAC, 750 V Peak Surge Rated Depending upon the SLIC type, it is usually possible to remove any EMI capacitors present between the output of the SLIC and ground when using capacitors C1 and C2 in parallel with the MOVs. 3 Bourns® TBU® Product Examples RS232 Interface RS485 Interface TBU-CA065-300-WH CDSOT23-SM712 MOV-10D201K RS232 SMBJ26CA RS485 TBU-CA065-200-WH 2031-23T-SM MOV-10D201K RS422 Interface CANBUS SMBJ12CA TBU-CA065-100-WH SMBJ12CA MOV-10D201K TBU-CA065-100-WH 2031-23T-SM CANBUS RS422 Diode voltage dependent on CANbus driver resistibility. Typically 6 - 20 V, check specification. Intelligent Transport System Intrinsically Safe Sensor TBU-CA065-100-WH TBU-CA065-100-WH 75 Ω Coax Composite Video 500 Ω Line 2031-23T-SM 75 Ω Microwave Link Video Surveillance TBU-CA025-300-WH HV LP Filter SDI Protection for higher power split mounted IF feed equipment DC or AC Power IF TX/RX 2031-15T-SM 4 Equipment SMAJ26A TBU-CA065-100-WH CDSOD323-T05LC 2031-23T-SM Bidirectional Dual TBU® Protectors TBU-PL, TBU-PK & P40 Product Families Maximum Ratings Part Number Operating Characteristics Vimp (V) Vrms (V) Itrigger Min. (mA) Itrigger Max. (mA) tblock (µs) Rtyp (Ω) P40-G240-WH 40 28 240 480 0.2 3.6 TBU-PL050-100-WH 500 300 100 200 1 50 TBU-PL050-200-WH 500 300 200 400 1 50 TBU-PL060-100-WH 600 350 100 200 1 50 TBU-PL060-200-WH 600 350 200 400 1 50 TBU-PL075-100-WH 750 400 100 200 1 50 TBU-PL075-200-WH 750 400 200 400 1 50 TBU-PL085-100-WH 850 425 100 200 1 50 TBU-PL085-200-WH 850 425 200 400 1 50 TBU-PK050-100-WH 500 300 100 200 1 80 TBU-PK060-100-WH 600 425 100 200 1 80 TBU-PK085-100-WH 850 425 100 200 1 80 Vimp Vrms Itrigger tblock Rtyp Device Size (mm) Form Factor 4.00 x 4.00 6.50 x 4.00 L C955401 6.50 x 4.00 K C955901 Maximum peak impulse voltage withstand with duration less than 10 ms. Maximum continuous alternating current RMS voltage. Minimum and maximum current required for the device to go from operating state to protected state. Maximum time for the device to go from normal operating state to protected state. Typical series resistance of the TBU® device. Consult factory for alternate specification values. See data sheet for detailed specifications. TBU® Lightning Surge Protection TBU® Power Fault Protection 3 2 200 mA/div. 2 100 V/div. 100 V/div. 200 mA/div. 3 1 1 1 µs/div. Ch1 V1 Ch2 V2 4 ms/div. Ch3 Current Ch1 V1 Ch2 V2 Ch3 Current 5 Bidirectional Single TBU® Protectors TBU-CA & TBU-CX Product Families Maximum Ratings Part Number 6 Operating Characteristics Vimp (V) Vrms (V) Itrigger Min. (mA) Itrigger Max. (mA) tblock (µs) Rtyp (Ω) TBU-CA025-050-WH 250 100 50 100 1 13.3 TBU-CA025-100-WH 250 100 100 200 1 7.1 TBU-CA025-200-WH 250 100 200 400 1 4.2 TBU-CA025-300-WH 250 100 300 600 1 3.2 TBU-CA025-500-WH 250 100 500 1000 1 2.6 TBU-CA040-050-WH 400 200 50 100 1 14.3 TBU-CA040-100-WH 400 200 100 200 1 8.1 TBU-CA040-200-WH 400 200 200 400 1 5.2 TBU-CA040-300-WH 400 200 300 600 1 4.3 TBU-CA040-500-WH 400 200 500 1000 1 3.6 TBU-CA050-050-WH 500 250 50 100 1 15.7 TBU-CA050-100-WH 500 250 100 200 1 9.5 TBU-CA050-200-WH 500 250 200 400 1 6.6 TBU-CA050-300-WH 500 250 300 600 1 5.6 TBU-CA050-500-WH 500 250 500 1000 1 5.0 TBU-CA065-050-WH 650 300 50 100 1 17.7 TBU-CA065-100-WH 650 300 100 200 1 11.5 TBU-CA065-200-WH 650 300 200 400 1 8.6 TBU-CA065-300-WH 650 300 300 600 1 7.6 TBU-CA065-500-WH 650 300 500 1000 1 7.0 TBU-CA085-050-WH 850 425 50 100 1 21.4 TBU-CA085-100-WH 850 425 100 200 1 15.2 TBU-CA085-200-WH 850 425 200 400 1 12.3 TBU-CA085-300-WH 850 425 300 600 1 11.3 TBU-CA085-500-WH 850 425 500 1000 1 10.7 TBU-CX025-VTC-WH 250 100 500 1000 1 2.6 TBU-CX040-VTC-WH 400 200 500 1000 1 3.6 TBU-CX050-VTC-WH 500 250 500 1000 1 5.0 TBU-CX065-VTC-WH 650 300 500 1000 1 7.0 TBU-CX085-VTC-WH 850 425 500 1000 1 10.7 Device Size (mm) Form Factor 6.50 x 4.00 A E075050 5 8.25 x 4.00 C 0 0 7X85 5 Unidirectional Single TBU® Protectors TBU-KE Product Family Maximum Ratings Part Number Operating Characteristics Vimp (V) Vrms (V) Itrigger Min. (mA) Itrigger Max. (mA) tblock (µs) Rtyp (Ω) TBU-KE025-050-WH 250 100 50 100 1 12.5 TBU-KE025-100-WH 250 100 100 200 1 6.3 TBU-KE025-200-WH 250 100 200 400 1 3.4 TBU-KE025-300-WH 250 100 300 600 1 2.4 TBU-KE025-500-WH 250 100 500 1000 1 1.8 TBU-KE040-050-WH 400 200 50 100 1 13.0 TBU-KE040-100-WH 400 200 100 200 1 6.8 TBU-KE040-200-WH 400 200 200 400 1 3.9 TBU-KE040-300-WH 400 200 300 600 1 3.0 TBU-KE040-500-WH 400 200 500 1000 1 2.3 TBU-KE050-050-WH 500 250 50 100 1 13.7 TBU-KE050-100-WH 500 250 100 200 1 7.5 TBU-KE050-200-WH 500 250 200 400 1 4.6 TBU-KE050-300-WH 500 250 300 600 1 3.6 TBU-KE050-500-WH 500 250 500 1000 1 3.0 Device Size (mm) 5.00 x 2.50 Form Factor E 0072550 2 Unidirectional Dual TBU® Protectors TBU-DT Product Family Maximum Ratings Part Number Operating Characteristics Vimp (V) Vrms (V) Itrigger Min. (mA) Itrigger Max. (mA) tblock (µs) Rtyp (Ω) TBU-DT065-100-WH 650 300 100 200 1 8.5 TBU-DT065-200-WH 650 300 200 400 1 5.6 TBU-DT065-300-WH 650 300 300 600 1 4.6 TBU-DT065-500-WH 650 300 500 1000 1 4.0 TBU-DT085-100-WH 850 425 100 200 1 10.3 TBU-DT085-200-WH 850 425 200 400 1 7.4 TBU-DT085-300-WH 850 425 300 600 1 6.8 TBU-DT085-500-WH 850 425 500 1000 1 5.8 Device Size (mm) 5.00 x 5.00 Form Factor T85 5 007 4 7 Worldwide Sales Offices CountryPhone Americas: +1-951-781-5500 Brazil: +55 11 5505 0601 China: +86 21 64821250 Europe: +41 (0)41 768 5555 Japan: +81 49 269 3204 Singapore: +65 6348 7227 Taiwan: +886 2 25624117 Other Asia-Pacific Countries: +886 2 25624117 Fax +1-951-781-5006 +55 11 5505 4370 +86 21 64821249 +41 (0)41 768 5510 +81 49 269 3297 +65 6348 1272 +886 2 25624116 +886 2 25624116 Technical Assistance RegionPhone Asia-Pacific: +886 2 25624117 Europe, Middle East, Africa: +41 (0)41 768 5555 Americas: +1-951-781-5500 Fax +886 2 25624116 +41 (0)41 768 5510 +1-951-781-5700 www.bourns.com Bourns® products are available through an extensive network of manufacturer’s representatives, agents and distributors. To obtain technical applications assistance, a quotation, or to place an order, contact a Bourns representative in your area. Specifications subject to change without notice. Actual performance in specific customer applications may differ due to the influence of other variables. Customers should verify actual device performance in their specific applications. “TBU” is a registered trademark of Bourns, Inc. in the U.S., Taiwan and European Community. “Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries. COPYRIGHT© 2012, BOURNS, INC. • WAG • 3/12 • 5M/FU1206